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All Output Voltage Versions Electrical Characteristics
Specifications with
boldface type
apply over for full operating temperature range, the other type are for T
J
=25 C
(Unless otherwise specified, V
IN
=12V for the 3.3V, 5V, and adjustable version and V
IN
=18V for the 12V version, I
LOAD
=500mA)
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Parameter
Device Parameters
Feedback Bias Current
Oscillator Frequency
Saturation Voltage
Max. Duty Cycle (ON)
Min. Duty Cycle (OFF)
Current Limit
Output Leakage Current
Quiescent Current
Standby Quiescent Current
Symbol
Test Condition
Min.
Typ.
Max.
-50
-100
173
173
1.4
1.5
-
-
-50
10
250
300
-
-
-
-
0.6
-
-15
-5
Unit
I
b
f
O
V
SAT
DC
I
CL
I
L
I
Q
I
STBY
θ
JC
Adjustable Version Only, V
FB
=1.3V
(Note 5)
-
120
110
-
-
2.1
-
-
-
-
-
-
-
-
2.0
-
-
-10
150
1.3
100
0
2.5
-
5
150
14
15
80
70
nA
KHz
V
%
A
uA
mA
uA
o
I
OUT
=2A
(Note 6,7)
(Note 7)
(Note 8)
Peak Current
(Note 6,7)
Output=0V
(Note 6,8)
(Note 8)
ON/OFF pin=5V
(Note 9)
DIP-8
SOP-8
DIP-8
SOP-8
Junction to
Case
Junction to
ambient
C/W
C/W
Thermal Resistance
θ
JA
ON/OFF Control
ON/OFF Pin Logic Input Threshold
Voltage
ON/OFF Pin Input Current
V
IH
V
IL
I
IH
I
IL
(Note 10)
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Low (Regulator ON)
High (Regulator OFF)
V
LOGIC
=2.5V (Regulator OFF)
V
LOGIC
=0.5V (Regulator ON)
1.3
-5
-0.02
V
uA
Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which
the device is intended to be functional, but do not guarantee specific performance limits. For guaranteed specifications and test conditions,
see the Electrical Characteristics.
Note 2: External components such as the catch diode, inductor, input and output capacitors, and voltage programming resistors can affect
switching regulator system performance.
Note 3: Typical numbers are at 25 C and represent the most likely norm.
Note 4: All limits guaranteed at room temperature (standard type face) and at temperature extremes (bold type face). All room temperature limits
are 100% production tested. All limits at temperature extremes are guaranteed via correlation using standard Statistical Quality Control
(SQC) methods. All limits are used to calculate Average Outgoing Quality Level (AOQL).
Note 5: The switching frequency is reduced when the second stage current limit is activated.
Note 6: No diode, inductor or capacitor connected to output pin.
Note 7: Feedback pin removed from output and connected to 0V to force the output transistor switch ON.
Note 8: Feedback pin removed from output and connected to 12V for the 3.3V, 5V, ADJ. version, and 15V for the 12V version, to force the output
transistor switch OFF.
Note 9: V
IN
=40V.
Note 10: Junction to ambient thermal resistance. (With copper area of approximately 3in )
2
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DS-RS1509-04 Oct, 2007
www.Orister.com
ORISTER [ ORISTER CORPORATION ]
